EP2594219A1

EP2594219A1 - Surgical screw rack

Info

Publication number: EP2594219A1
Application number: EP11009096.6A
Authority: EP
Inventors: Andreas Heede; Norbert Hentsch; Arno Schindler
Original assignee: Stryker Trauma GmbH
Current assignee: Stryker European Holdings I LLC
Priority date: 2011-11-16
Filing date: 2011-11-16
Publication date: 2013-05-22
Anticipated expiration: 2031-11-16
Also published as: US9107502B2; EP2594219B1; US20130119001A1

Abstract

A rack for holding at least one surgical screw is described. The rack comprises a body in which at least one bore is provided and at least two support elements surrounding the bore. The support elements protrude from a first level defined on or in the body and are configured to support the screw head on a second level above the first level. The support elements are spaced apart from each other to define spaces therebetween for enabling fluid communication between the surface and the bore. Further, a system is described comprising the above mentioned rack and one or more surgical screws accommodated in the rack.

Description

Technical Field

The present disclosure generally relates to surgical equipment. In particular, a rack for holding at least one surgical screw so as to be accessible by a fluid medium is described.

Background

Surgical screws must be cleaned and sterilized before they can be used for surgery. For this purpose, the surgical screws may be stored in a rack. The rack with the screws will be placed in a cleaning or sterilization chamber into which a fluid cleaning or sterilization medium (such as hot water vapor) is then introduced. To obtain a good cleaning or sterilization result, the surgical screws should be arranged in the rack such that the fluid medium can fully access the screws. It should also be ensured that the surgical screws can be easily removed from the rack after the cleaning or sterilization operation.
DE 20 2007 007 409 U1 discloses a sterilization rack for surgical screws. The rack comprises a plate with holes for accommodating the screws. Two holes are connected by an elongate slot, wherein the diameter of each hole is larger than the width of the connecting slot. Each hole is adapted to accommodate a shaft of a surgical screw. A head of the surgical screw has a lager diameter than the hole, so that the material surrounding the hole can support the screw head when inserted into the hole.

Summary

There is a need for a surgical screw rack that facilitates an efficient cleaning or sterilization of one or more surgical screws accommodated in the rack.
According to one aspect, a rack for holding at least one surgical screw so as to be accessible by a fluid medium is provided, wherein the at least one surgical screw has a screw head and a screw shaft. The rack comprises a body having a surface, wherein in the surface at least one bore is provided that is configured to at least partly accommodate the screw shaft. The rack further comprises at least two support elements surrounding the bore, wherein the support elements protrude from a first level defined on or in the body and are configured to support the screw head on a second level above the first level, and wherein the support elements are spaced apart from each other to define spaces therebetween that enable a fluid communication between the surface and the bore.
The body may be realized in the form of a solid block or plate. The body may have an upper surface and a lower surface. The first level and the second level may be located above the lower surface. In one implementation, the second level may correspond to the upper surface of the body. In an alternative implementation, the first level may correspond to the upper surface of the body.
The bore may be realized in the form of a through-bore or otherwise. Moreover, the bore may have a circular or non-circular (e.g., rectangular or oval) cross-section.
The spaces defined between the support elements may be realized in the form of openings. The spaces may stretch in a vertical direction from the first level to the second level or, alternatively, over less than that.
In one realization, the spaces can be arranged on opposite sides of the bore. One bore can also have three or more surrounding support elements, wherein a space is defined between each pair of adjacent the support elements. An individual support element may extend (e.g., at least at the second level) in circumferential direction over at most 45 degrees, 60, degrees, 90 degrees, 120 degrees, 140 degrees, 160 degrees or 170 degrees of a circumference of the bore (or of a surgical screw received therein).
Several bores and support elements can be arranged in a row to accommodate a plurality of surgical screws in the rack. Two bores of the row can have one common, or shared, support element which can at least partly support two screw heads. The row can have a curved or a linear shape.
In one realization, a row of bores and support elements can be arranged adjacent to a groove or between two grooves. In the case of multiple grooves, the distance between two neighboring grooves may be less than the extension of a bore (e.g., its diameter) in a direction perpendicular to the grooves.
The one or more grooves may be provided in the surface of the body. Each groove may be configured to guide a fluid medium to the bore via the spaces. Moreover, each groove may have a bottom that defines the first level.
According to an exemplary realization, multiple parallel rows of bores and support elements can be arranged in or on the body. Each row can be distanced from the adjacent row by a shared (or common) groove.
In another aspect, a system comprising one or more surgical screws and the rack presented herein is provided, wherein the surgical screws are accommodated in the rack. The support elements can be configured to support the screw head on the second level.
In one implementation, a screw is received such in the rack that only the screw head is in contact with the body of the rack. A contact portion between the screw head accommodated in the rack and each support element surrounding the bore may be a curved line. For a single support element, the curved line may extend over at most 45, degrees, 60 degrees, 90 degrees, 140 degrees, 160 degrees or 170 degrees of a circumference of the screw head.

Brief Description of the Drawings

These and other features, aspects and advantages of the present disclosure will become more apparent form the following detailed description taken in conjunction with the accompanying drawings, wherein:

Fig. 1 shows a perspective view of an embodiment of a surgical screw rack;
Fig. 2 shows a partial top view of the rack of Fig. 1, wherein one screw is accommodated in one bore of the rack;
Fig. 3 shows a partial perspective view of the rack of Fig. 1, wherein one screw is accommodated in one bore of the rack;
Fig. 4 is a further partial perspective view of the rack, wherein a part of the rack is shown in a sectional view with respect to line A-A of Fig. 3; and
Fig. 5 shows a sectional view of the rack with respect to line B-B of Fig. 3, wherein a screw is accommodated in one bore of the rack.

Detailed Description

In the following the same reference numerals will be used to denote the same or similar structures in the drawings.
Fig. 1 shows a perspective view of an embodiment of a rack 1 in the form of a tray that is configured to hold surgical screws for sterilization or cleaning purposes. The rack 1 comprises a body 2 in the form of a solid plate in which a plurality of bores 7 is provided. The body 2 has an upper surface 4 bearing (e.g., printed or engraved) information and a lower surface. During surgery the right surgical screw has to be chosen for the right surgical purpose, and the information on the upper surface 4 may thus be indicative of at least one of a type, length and diameter of the screw in close association with the screw accommodated in the rack 1.
The rack 1 comprises sidewalls with openings that permit an easy access of a cleaning or sterilization medium to the surgical screws accommodated in the body 2 in a hanging fashion. The rack 1 is intended to be placed together with the surgical screws accommodated therein in a chamber of a cleaning or sterilization device. Any fluid medium known in the art (such as hot water vapor) may be used for cleaning or sterilization purposes.
Fig. 2 shows a partial top view of the body 2 of the rack 1 of Fig. 1, wherein one surgical screw 12 is accommodated in one of the bores 7 of the rack 1. Each bore 7 is surrounded by two support elements 3 which are arranged on opposite sides of the bore 7. It is also possible that three, four or more support elements 3 were provided per bore 7.
As shown in Fig. 3, the support elements 3 protrude from a first level within the body 2 (i.e., below the upper surface 4 but above the lower surface thereof). The upper surface 4 of the body (which in the present embodiment coincides with the upper surface of the support element 3) defines a second level which is above the first level. The screw head of the surgical screw 12 is supported in the rack 1 only at the second level defined by the support elements 3. The first level is defined by a bottom 11 of multiple parallel grooves 10 provided in the upper surface 4 of the body 2. Each groove 10 is arranged between two rows of bores 7 and support elements 3, as shown in Figs. 2 and 3.
The height of each support element 3 is defined as the distance between the first level and the second level. Every support element 3 can have the same height (and its upper surface therewith the same distance to the bottom 11 of the groove 10). A sidewall 5 of the support element 3 forms the sidewall of the adjacent groove 10.
Two openings or open spaces 6 are defined between the two support elements 3 that surround each bore 7 for enabling a fluid communication between the upper surface 4 of the body 2 and the bore 7. As will be appreciated, the fluid communication is maintained even when the surgical screw 12 is inserted with its shaft into the bore 7 and the screw head abuts the support elements 3.
The two spaces 6 are arranged on opposite sides of the bore 7. Each space 6 stretches in a vertical direction from the first level to the second level. Hence, the height of each of the support elements 3 equals the height of each of the spaces 6. The cross-section of each space 6 is substantially rectangular and limited by the surrounding support elements 3 and the bottom 11 of the groove 10 (and the screw head). However, the cross-section of each space 6 can also be triangular or circular (or have any other shape) as long as a fluid medium can pass through the space 6.
In general, each support element 3 has a width which is defined between two sidewalls 5 of the support element 3 (each directed toward the respective opposite groove 10, as best shown in Fig. 3) and a length which is defined in a direction parallel to the adjacent groove 10. As shown in Fig. 2, the width of each support element 3 is slightly smaller than the diameter of an adjacent bore 7 (which gives rise to the spaces 6 upon milling the grooves 10 into the body 2).
Each support element 3 extends in a circumferential direction over approximately 135 degrees of a circumference of an individual bore 7. The remaining circumference of the bore 7 (of approximately 90 degrees) is occupied by the two spaces 6 defined between the support elements 3, shared equally. When the circumference of each support element 3 with respect to the bore 7 is reduced, the circumference of each space 6 is increased, and vice versa. Thus, when the width of the support element 3 becomes smaller, the width of each space 6 defined between the support elements 3 increases.
Several bores 7 and support elements 3 arranged in a straight line define one row 8, wherein each row 8 can have in principle also any other shape as long as the bores 7 are distanced from each other such that a fluid medium can easily access the screws 12 accommodated in the bores 7. Several rows 8 are arranged side by side in the upper surface 4 of the body 2. In the present embodiment, the rows 8 of bores 7 and support elements 3 are parallel to each other.
As stated above, several grooves 10 are arranged between the parallel rows 8 of bores 7 and support elements 3, wherein each row 8 is situated between two grooves 10. The bores 7 and the support elements 3 of one row 8 are arranged in the same order as the bores 7 and the support elements 3 of an adjacent row 8 such that each support element 3 or each bore 3 faces an adjacent support element 3 or an adjacent bore 3 on the other side of the common groove 10.
The width of each groove 11 arranged between two rows 8 of bores 7 and support elements 3 is approximately half of the diameter of a bore 7 (or more). The central axes of the grooves 10 are substantially perpendicular to the central axes of the bores 7. Each bore 7 is in fluid communication with each of the two grooves 10 which surround the bore 7 via the spaces 6 such that a fluid medium for cleaning or sterilization purposes is enabled to access the screw 12 accommodated in the bore 7 from both sides via the grooves 10.
Each bore 7 is arranged between two support elements 3 such that the upper surfaces of the support elements 3 define a support portion to support the screw 12 at or near the circumference of the bore 7, more particularly at the edges between the upper surfaces 4 of the support elements 3 and the sidewalls of the bore 7, as best shown in Figs. 4 and 5. Thus, the screw 12, in particular the screw head of the screw 12, is supported only at these edges. Thereby, the contact portion between the screw 12 and each of the two support elements 3 is reduced to a curved line or a circular arc segment, which in turn increases the accessibility of the screw 12 by a cleaning or sterilization medium.
Each bore 7 is associated with two spaces 6 which are arranged on opposite sides relative to a central axis of the bore 7 and open into the adjacent grooves 10. An adjacent bore 7 which is separated from the bore 7 by the common groove 10 also comprises two such spaces 6. These spaces of both bores are arranged in one straight line in a direction which is perpendicular to the groove 10. Thus, a fluid medium for cleaning or sterilizing the screws 12 accommodated in the bores 7 can pass the rack 1 not only in longitudinal direction along the grooves 10 but also in a transverse direction perpendicularly to the grooves 10 through the spaces 6.
As best shown in Fig. 5, the diameter of the shaft of the screw 12 is smaller than the diameter of the bore 7 of the rack 1. The diameter of the screw head is larger than the diameter of the bore 7 so that screw can be supported at the second level by the support elements 3 surrounding the bore 7. The only contact portion between the screw 12 and the rack 1 is between the support elements 3 and the screw head. The screw 12 can thus be arranged in a hanging fashion such that the central axis of the screw 12 is concentric to the central axis of the bore 7 (see Fig. 5).
The height of the bore 7 is typically at least half of the length of the screw 12 accommodated in the bore 7. The bore 7 can have cylindrical sidewalls, or the sidewalls can have a concave or convex shape as long as the distance between the sidewalls of the bore 7 and the screw 12 is sufficient to allow the fluid medium to access the screw for cleaning or sterilization purposes.
As also shown in Figs. 3 and 5, the maximum diameter of the screw head is larger than the diameter of the bore 7 so that a part of the screw head overlaps with the two grooves which are arranged adjacent to the bore 7. Moreover, the screw head is located on the second level defined by the upper surface 4 of the support element 3. Hence, a user or removal instrument (such as tweezers) can easily grip the screw 12 via the spaces 6 that are arranged on opposite sides of the bore 7.
As has come apparent from the description of an exemplary embodiment, the rack 1 is adapted to accommodate screws 12 which can be easily cleaned or sterilized due to the fact that support elements 3 surrounding a bore 7 define open spaces 6 therebetween for enabling fluid communication between the rack surface 4 and the bore 7 so that a fluid medium can easily access the screw shaft and also the screw head.
Further, in one implementation the only contact area between the screw 12 and the rack 1 is the edge between the support elements 3 surrounding the bore 7 and the sidewall of the bore 7, so that the fluid medium can access essentially the whole screw 12. A further advantage of the present disclosure is that due to the spaces 6 and the exposed screw head the screw 12 can easily be inserted and picked up by a user or a removal instrument.
While the present disclosure has been described with respect to particular embodiments, those skilled in the art will recognize that the present disclosure is not limited to the specific embodiments described and illustrated therein. It is to be understood that the disclosure is only illustrative. Accordingly, it is intended that the invention be limited only to the scope of the claims attached thereto.

Claims

A rack (1) for holding at least one surgical screw (12) so as to be accessible by a fluid medium, wherein the at least one surgical screw (12) has a screw head and a screw shaft, the rack comprising:
- a body (2) having a surface, wherein in the surface at least one bore (7) is provided that is configured to at least partly accommodate the screw shaft; and

- at least two support elements (3) surrounding the bore (7), wherein the support elements (3) protrude from a first level defined on or in the body (2) and are configured to support the screw head on a second level above the first level, wherein the support elements (3) are spaced apart from each other to define spaces (6) therebetween that enable a fluid communication between the surface and the bore (7).
The rack of claim 1, wherein the spaces (6) stretch in a vertical direction from the first level to the second level.
The rack of claim 1 or 2, wherein the spaces (6) are arranged on opposite sides of the bore (7).
The rack of any of the preceding claims, wherein each support element (3) extends over at most 170° of a circumference of the bore (7).
The rack of any of the preceding claims, wherein several bores (7) and support elements (3) are arranged in a row (8).
The rack of claim 5, wherein one common support element (3) is arranged between two bores (7).
The rack of claim 5 or 6, wherein the row (8) has a linear shape.
The rack of any of claims 6 to 7, wherein the row (8) of bores (7) and support elements (3) is arranged between two grooves (10), wherein the spaces (6) enable a fluid communication between the grooves (10) and bore (7).
The rack of claim 8, wherein the row (8) of bores (7) and support elements (3) and the grooves (10) are parallel to each other.
The rack of claim 8 or 9, wherein each groove (10) has a bottom (11) that defines the first level.
The rack of any of claims 6 to 10, wherein multiple parallel rows (8) of bores (7) and support elements (3) are provided.
A system comprising the rack (1) of any one of the preceding claims and one or more surgical screws (12) accommodated in the rack (1).
The system of claim 12, wherein only the screw head of the surgical screw (12) is in contact with the body (2) of the rack (1).
The system of claim 12 or 13, wherein a contact portion between the screw head accommodated in the rack (1) and each support element (3) surrounding the bore (7) is a curved line.
The system of any of claims 12 to 14, wherein the distance between the first level and the second level is at least half the length of the surgical screw (12).